Pendent switch for valves.



PATENTED, AUG. 13, 1.907.

'RJ N. OAKMAN. PENDBNT SWITCH FOR VALVES.

APBLIOATION'ILED DEO.24,1906.

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TH: Monk/e: versies ca WASHINGTON, n, c.

UNITED STATES PATENT OFFICE..

PENDENT SWITCH FOR VALVES.

No. 862,990. Specification of Letters Patent. Patented Aug. 13, 1907.

Application filed December 24,1906. Serial No. 349,319.

To all whom it may concern:

Be it known that I, RICHARD N. OAKMAN, a citizen of the United States, residing at Brooklyn, in the State of New York, have invented certain new and useful Improvements in Pendent Switches for Valves, of which the following is a specification.

This invention relates to an air switch device adapted to be suspended by a small flexible tube from a chandelier or elevated gas burner for operating a reciprocating piston valve to open or close gas ports.

The object of my invention is to provide a device of simple construction, which may be held and operated by one hand, and adapted to connect by a flexible tube with the piston-chamber of a gas burner for producing air pressure or exhaustion to reciprocate a valve controlling gas ports in the burner.

The matter constituting my invention will be defined in the claims.

I will now describe the details of construction of my improved device by reference to the accompanying drawings, in which,-d

Figure 1 represents a side view of an incandescent burner and my pendent air switch device connecting therewith by a small flexible air tube. Fig. 2 represents a longitudinal section of the air switch device. Fig. 3 represents a top view of one half of the inclosing shell.

My air switch device 8 is made small and light, and provided with a sheet metal shell having a configuration which permits it to be held between two fingers while, at the same time, it is manipulated by the thumb and a nger of one hand. It is usually suspended from a chandelier or cluster of burners located too high to be reached from the floor and may be connected by branch tubing with three or more burners so that the valves of all of them may be opened or closed at the same time by one movement of its actuating part.

In the drawing I have shown the air switch 8 connecting with a single incandescent burner which will serve to illustrate its function and operation. The pillar 1 of the burner is provided near the base with a transverse piston-chamber 2 containing a reciprocating piston-valve 3 which controls the gas port or passage admitting gas to the burner. To a boss at one side of the pillar and having a gas passage connect a pilot tube 4. A coupling 5 is applied to screwthreaded extension of chamber 2 and connects an air tube 6 with the interior of the chamber. Tube 6 drops down and connects with a coupling tube 7 of the air switch device 8. Tube 7 communicates through port 10 with the interior pressure and exhaust chamber 18.

In the air switch device is provided a cylinder 9 divided by a transverse partition plate 11 to form on one side a pressure and exhaust chamber 18 containing a piston, and on the other side a stufiing box 25, through which the piston rod works. A thick packing ring 11fL is secured to plate 11 in box 25 and serves for making a tight joint with the reciprocating rod. Plate 11 is made with a central opening for passage of the rod. The wall of cylinder 9 is provided with an air port l0 at the inner end of chamber 1S and in communication with 'coupling tube 7.

The piston rod is composed of two connecting screwbolts 12 and 12' which serve for securing the piston 16 in place and provide for easily and quickly assembling the parts of the device in operative position. The bolt 12 has a reduced and externally screw-threaded extension 13, proiding a circular shoulder or bearing 15 for the piston 16. The bolt 12EL has a deep screw-threaded opening or socket 14 for receiving the extension 13. The piston 16 has a small central opening, just large enough to permit it to be turned onto the screwtlneaded extension 13 up to the circular shoulder 15. After it is thus applied the bolt 12' is screwed onto eX- tension 13 so that its inner end presses against the piston and holds it against shoulder 15, making a tight joint therewith. To the outer ends of the bolts 12 and 12tL are secured disks or knobs 17 and 17 L which serve as push-buttons to move the piston inward and outward in chamber 18. The cylinder 9 is inclosed in a shell composed of two tapering half-portions 19 and 20, joined and overlapping at their peripheral rims 23. The ends of these shell portions close the ends of cylinder 9 and have central holes 21 through which pass the two-part piston-rod 12, 12@ and form guideways therefor. The partition Il and packing ring 11a also form a support and guide-way for the piston-rod. The overlapping rims 23 have notches 22 for passage of the coupling tube 7. The tapering half-portions 19 and 20 of the shell are preferably curved inward, as shown, to give a graceful outline to the device and afford means for holding it between the fingers.

In assembling the parts of the device into operative position, as shown in Fig. 2, the bolt 12 may first beinserted through opening 2l in the shell portion 19, the piston 16 then turned onto the screw-threaded extension 1S up to the shoulder 15 and the cylinder 9 then slid over the piston 16. The bolt 12l may now be inserted through opening 21 in the shell portion 20 and the two bolts then screwed together till the inner end of bolt 12a bears against the piston, thus securely holding it in place against the bearing shoulder 15. The shells will then be joined by their overlapping rims 23 and the device is ready to be attached to an air tube 6 which will be attached at its upper end by means of the coupling 5 to the gas burner. The device may be readily grasped between the fingers of one hand and at the same time be operated by pressure on either one of the buttons 17 or 1711 to produce either pressure or exhaustion in chamber 18, and in the piston chamber 3 of the burner, for reciprocating the piston-valve therein to open or close the gas port or passage-Way to the burner. l

Having described my invention, what I claim, and desire to secure by Letters Patent, is,-

1. In an air switch device, the combination with a cylindel having a partition provided with a central opening and a packing rim, of a piston rod extending through said partition and both ends of the cylinder and composed of two bolts screwed, one into the other and a piston engaged and held by said bolts in a chamber of the cylinder, said chamber having ra port and a connecting coupling tube, substantially as described.

2. In an air switch device, a cylinder divided by a perfoi-ated partition into a stulfing box on one side and a compression and exhaust chamber on the other, which chamber is provided with a port and a coupling tube, in combination with a piston rod composed of two bolts, one of which has a screw-threaded socket and the other a reduced and screw-threaded extension having at its base a circular shoulder, a piston applied against said shoulder and held in place by the end of the bolt which is screwed on to said extension, and an inclosing shell, substantially as described.

3. In an air switch device, the combination with a cylinder having a perforated partition and packing, of a piston rod composed of two bolts screwed one into the other, a piston secured in place by said bolts and working in the cylinder, an inclosing shell composed of two tapering portions having openings in the ends for the piston rod and joined centrally by overlapping rims, said partition in the cylinder and ends ef the shell portions forming guide-ways for the piston rod, substantially as described.

In testimony whereof I aiix my signature in presence of two witnesses.

RICHARD N. OAKMAN.

Witnesses z M. TURNER, HAnnin'r SIMON. 

